ISO a square potato knish recipe

[Mjx]

I have a huge craving for the sort of square potato knish that I've bought from New York City food carts, and in some delis.

But, I'm in Denmark, which is notable for its complete absence of knishes, so I thought I'd make my own: They seem to be simple things, pillows of mashed potato mixture, apparently fried. The surface suggests...breading..? Not actual dough, though I'm guessing, because it's been a while, and I've never paid much attention to their surface structure, because I've been focused on devouring these delicious things.

 

The internet has yielded nothing helpful, and even here, on eGullet, the recipes involve a far doughier exterior than what I crave.

 

Anyone have a recipe they're willing to share, or suggestions, or observations?

 

TIA🌟